A simplex dispersion model for improving precision in the odds ratio confidence interval in mixture experiments

Autores

  • Gilberto Rodrigues Liska Universidade Federal de São Carlos Autor http://orcid.org/0000-0002-5108-377X
  • Marcelo í‚ngelo Citillo Universidade Federal de Lavras Autor
  • Fortunato Silva de Menezes Universidade Federal de Lavras Autor
  • Júlio Silvio de Sousa Bueno Filho Universidade Federal de Lavras Autor

DOI:

https://doi.org/10.4025/actascitechnol.v42i1.44068

Palavras-chave:

dispersion model family; proportion; mixture model; mammary gland tumors; odds ratio.

Resumo

A new approach to data analysis in mixture experiments is proposed using the simplex regression, that is in the class of dispersion models family. The advantages of this approach are illustrated in an experiment studying the mixture effect of fat, carbohydrate, and fiber on tumors´ proportion in mammary glands of rats. Model was evaluated by goodness of fit criteria, simulated envelope charts for residuals of adjusted models, odds ratios graphics and their respective confidence intervals. The simplex regression model showed better quality of fit and smaller odds ratio confidence intervals.

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Publicado

2020-05-28

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Seção

Estatí­stica

Como Citar

A simplex dispersion model for improving precision in the odds ratio confidence interval in mixture experiments. (2020). Acta Scientiarum. Technology, 42(1), e44068. https://doi.org/10.4025/actascitechnol.v42i1.44068

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